# Evolution of ferroelectric $LiMO_{3}$ phase in a reactive glass matrix $(LiBO_{2}-Nb_{2}O_{5})$

Prasad, Syam N and Varma, KBR (2005) Evolution of ferroelectric $LiMO_{3}$ phase in a reactive glass matrix $(LiBO_{2}-Nb_{2}O_{5})$. In: Journal of Non-crystalline Solids, 351 (16-17). pp. 1455-1465.

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Transparent glasses in the system $(100 - x)LiBO_{2}-xNb_{2}O_{5}$ (5 \leq = x \leq = 25, in molar ratio) were fabricated by the conventional melt quenching technique. The as-quenched samples were amorphous as established via X-ray powder diffraction (XRD) studies. Differential thermal analyses(DTA) confirmed their glassy nature. The glass transition temperature(T-g) and the crystallization temperature were found to be strongly composition (x) dependent. Lithium niobate $(LiNbO_{3})$ nanocrystals were produced within the glass by heat-treating it at 500 degrees C/3 h (for x = 15). Two-stage heat-treatment process has improved the optical transmission characteristics. Impedance analysis was done to rationalize the electrical behavior of these glasses embedded with 100nm sized $LiNbO_{3}$ crystallites. The observed pyroelectric response and ferroelectric (P vs E) hysteresis loop at room temperature confirmed the polar nature of these composites.